So You Want to Be a Wizard: The First Book in the Young Wizards Series

A mysterious library book opens the door to a world of magic and danger in the first book in the beloved Young Wizards series. Bullied by her classmates, Nita Callahan is miserable at school. So when she finds a mysterious book in the library that promises her the chance to become a wizard, she jumps at the opportunity to escape her unhappy reality. But taking the Wizard's Oath is no easy thing, and Nita soon finds herself paired with fellow wizard-in-training Kit Rodriguez on a dangerous mission. The only way to become a full wizard is to face the Lone Power, the being that created death and is the mortal enemy of all wizards. As Nita and Kit battle their way through a deadly alternate version of New York controlled by the Lone Power, they must rely on each other and their newfound wizarding skills to survive--and save the world from the Lone One's grasp.

Something stopped Nita's hand as it ran along the bookshelf. She looked and found that one of the books had a loose thread at the top of its spine. It was one of those So You Want to Be a . . . books, a series on careers. So You Want to Be a Pilot, and a Scientist . . . a Writer. But his one said, So You Want to Be a Wizard.
I don't belive this, Nina thought. She shut the book and stood there holding it in her hand, confused, amazed, suspicious-and delighted. If it was a joke, it was a great one. If it wasn't . . . ?

Thirteen-year-old Nita, tormented by a gang of bullies because she won't fight back, finds the help she needs in a library book on wizardry which guides her into another dimension.